Geography Study Notes: Water, Agriculture, and Resources
Water Pollution and Conservation in India
1. Causes of Water Pollution and Conservation Measures
Water pollution is the contamination of water by harmful substances, rendering it unfit for human use and aquatic life.
Reasons for Water Pollution
- Domestic sewage: Untreated wastewater discharged into rivers and lakes.
- Industrial waste: Chemicals and toxic substances from factories.
- Agricultural runoff: Fertilisers and pesticides entering water bodies.
- Religious and cultural activities: Waste deposited in water sources.
- Solid waste: Dumping of plastics and garbage.
Measures for Water Conservation
- Promote rainwater harvesting.
- Use drip and sprinkler irrigation to reduce wastage.
- Treat domestic and industrial wastewater before discharge.
- Implement watershed management and groundwater recharge.
- Prevent dumping of garbage and chemicals.
- Encourage water recycling.
2. Watershed Management
Watershed management involves the conservation of water and natural resources within a watershed area. Its objectives include soil and water conservation, reducing surface runoff, and increasing groundwater recharge.
3. Rainwater Harvesting
Rainwater harvesting is the collection and storage of rainwater for future use or groundwater recharge. It helps reduce water scarcity, increases groundwater levels, and mitigates urban flooding.
Primary Activities
1. Nomadic Herding
A subsistence practice where herders move with animals (sheep, goats, camels, yaks) in search of pastures. It is common in dry, mountainous, and cold regions.
2. Commercial Livestock Rearing
A systematic, large-scale animal husbandry practice focused on meat, wool, and hides. It requires significant capital, modern technology, and scientific breeding.
3. Types of Agriculture
- Primitive Subsistence: Simple tools for personal consumption.
- Intensive Subsistence: High labour input in densely populated areas.
- Commercial Agriculture: Market-oriented using modern machinery.
- Plantation Agriculture: Large-scale farming of a single crop (e.g., tea, coffee).
- Mixed Farming: Combining crop cultivation and livestock rearing.
- Mediterranean Agriculture: Focused on grapes, olives, and citrus fruits.
Secondary Activities and Manufacturing
1. Manufacturing and Industry
Manufacturing transforms raw materials into finished goods using labour and technology. Footloose industries are not location-dependent, as they use light raw materials and can be established in various places (e.g., electronics, software).
2. Industrial Classification by Raw Materials
- Agro-based: Uses agricultural products (e.g., sugar, textiles).
- Mineral-based: Uses mineral ores (e.g., iron and steel).
- Chemical-based: Uses chemical substances (e.g., fertilisers, pharmaceuticals).
- Forest-based: Uses forest products (e.g., paper, furniture).
- Animal-based: Uses animal products (e.g., leather, wool).
Mineral and Energy Resources
1. Mineral Belts in India
- North-Eastern Plateau: Rich in iron ore, coal, and mica.
- South-Western Plateau: Rich in iron ore and manganese.
- North-Western Region: Rich in copper, zinc, and limestone.
- Himalayan Region: Contains limestone and gypsum.
2. Energy Resources
Conventional Sources
Coal is vital for electricity and industry. Major fields include Jharia, Raniganj, and Talcher.
Non-Conventional Sources
- Solar: Abundant potential in Rajasthan and Gujarat.
- Wind: Significant in Tamil Nadu and coastal states.
- Tidal: Potential in the Gulf of Khambhat and Kachchh.
- Biogas: Derived from organic waste, ideal for rural areas.
- Geothermal: Heat from the Earth, such as in Puga Valley.